Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5654479 | 4-substituted bis(2,6-diisopropylphenyl)-carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation | Friedhelm Lehrich, Siegmund Pohl, Helmut Tesch, Roland Minges, Johann Swoboda +3 more | 1997-08-05 |
| 5637664 | Polymeric, catalytically active compounds, their preparation, and their use as catalysts in the preparation of polyisocyanates containing uretdione groups | Roland Minges, Christian Schade, Konrad Stiefenhoefer | 1997-06-10 |
| 5621138 | 4-substituted bis (2,6-diisopropylphenyl)- carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation | Friedhelm Lehrich, Siegmund Pohl, Helmut Tesch, Roland Minges, Johann Swoboda +3 more | 1997-04-15 |
| 5597885 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures | Heinz-Dieter Lutter, Claudia Spang, Roland Minges, Dietrich Scherzer, Michael Lugmayr +1 more | 1997-01-28 |
| 5597942 | Carbodiimides and/or oligomeric polycarbodiimides based on 1 3-bis (1-methyl-1-isocyanatoethyl) benzene their use as hydrolysis stabilizers | Siegmund Pohl, Friedhelm Lehrich, Manfred Genz, Helmut Tesch, Roland Minges +1 more | 1997-01-28 |
| 5596063 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures of this type | Heinz-Dieter Lutter, Claudia Spang, Roland Minges, Dietrich Scherzer, Michael Lugmayr +1 more | 1997-01-21 |